40172997803 has 2 divisors, whose sum is σ = 40172997804. Its totient is φ = 40172997802.

The previous prime is 40172997773. The next prime is 40172997827. The reversal of 40172997803 is 30879927104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40172997803 - 2⁸ = 40172997547 is a prime.

It is a super-2 number, since 2×40172997803² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40172997883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20086498901 + 20086498902.

It is an arithmetic number, because the mean of its divisors is an integer number (20086498902).

Almost surely, 2^40172997803 is an apocalyptic number.

40172997803 is a deficient number, since it is larger than the sum of its proper divisors (1).

40172997803 is an equidigital number, since it uses as much as digits as its factorization.

40172997803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 40172997803 in words is "forty billion, one hundred seventy-two million, nine hundred ninety-seven thousand, eight hundred three".